Global Patent Index - EP 2661880 A4

EP 2661880 A4 20160629 - METHOD AND APPARATUS OF IMPROVED INTRA LUMA PREDICTION MODE CODING

Title (en)

METHOD AND APPARATUS OF IMPROVED INTRA LUMA PREDICTION MODE CODING

Title (de)

VERFAHREN UND VORRICHTUNG FÜR VERBESSERTE KODIERUNG EINES INTRA-LUMA-PRÄDIKTIONSMODUS

Title (fr)

PROCÉDÉ ET APPAREIL DE CODAGE AMÉLIORÉ DU MODE DE PRÉDICTION DE LUMINANCE EN INTRA

Publication

EP 2661880 A4 20160629 (EN)

Application

EP 11855024 A 20110705

Priority

  • US 201161430701 P 20110107
  • US 201161437910 P 20110131
  • CN 2011076870 W 20110705

Abstract (en)

[origin: US2012177113A1] A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra prediction modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is being considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. While the coding scheme for the intra luma prediction mode being considered may not fully exploit the neighboring intra luma prediction modes, it is desirable to further improve the performance. Accordingly, an improved coding scheme for intra prediction mode is disclosed, where more than one intra prediction mode candidates are derived.

IPC 8 full level

H04N 19/463 (2014.01); H04N 19/196 (2014.01); H04N 19/593 (2014.01)

CPC (source: EP US)

H04N 19/159 (2014.11 - US); H04N 19/196 (2014.11 - EP US); H04N 19/463 (2014.11 - EP US); H04N 19/593 (2014.11 - EP US); H04N 19/11 (2014.11 - EP US)

Citation (search report)

  • [XI] ANONYMOUS: "The H.264 Advanced Video Compression Standard, 2nd Edition, chapter 6, H.264 Prediction, Iain E. Richardson", NOT KNOWN,, 20 April 2010 (2010-04-20), XP030001637
  • [XI] WIEGAND T ET AL: "High Efficiency Video Coding (HEVC) text specification Working Draft 1", 3. JCT-VC MEETING; 95. MPEG MEETING; 7-10-2010 - 15-10-2010;GUANGZHOU; (JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ISO/IECJTC1/SC29/WG11 AND ITU-T SG.16 ); URL: HTTP://WFTP3.ITU.INT/AV-ARCH/JCTVC-SITE/,, no. JCTVC-C403, 6 January 2011 (2011-01-06), XP030008032, ISSN: 0000-0018
  • [XPI] MEI GUO ET AL: "Improved Intra Mode Coding", 4. JCT-VC MEETING; 95. MPEG MEETING; 20-1-2011 - 28-1-2011; DAEGU;(JOINT COLLABORATIVE TEAM ON VIDEO CODING OF ISO/IEC JTC1/SC29/WG11AND ITU-T SG.16 ); URL: HTTP://WFTP3.ITU.INT/AV-ARCH/JCTVC-SITE/,, no. JCTVC-D166, 15 January 2011 (2011-01-15), XP030008206, ISSN: 0000-0015

Citation (examination)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

US 2012177113 A1 20120712; US 9596483 B2 20170314; AU 2011354441 A1 20130502; AU 2011354441 B2 20140717; CN 103299622 A 20130911; CN 103299622 B 20160629; EP 2661880 A1 20131113; EP 2661880 A4 20160629; MX 2013006339 A 20130826; US 2015131722 A1 20150514; US 9374600 B2 20160621; WO 2012092763 A1 20120712

DOCDB simple family (application)

US 201113198697 A 20110804; AU 2011354441 A 20110705; CN 2011076870 W 20110705; CN 201180063914 A 20110705; EP 11855024 A 20110705; MX 2013006339 A 20110705; US 201514594145 A 20150111